Improvement in wkenohes



@uitrit faire getint @frn DENN IS HARRIGAN, OF CHARLESTOWN,MASSACHUSETTS.

Letters Patent No. 69,911, dated October 15, 1867.

IMPROVEMENT IN' Warrants.

,TO ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Be it known that I, DENNIS HARRIGAN, of Charlestown, in the county ofMiddlesex, and State of Massachusetts, have invented an ImprovedWrencl1,and do hereby declare that the following is a full, clear, andexact description thereof, one which will enable those skilled in theart to which my invention appcrtains to make and use it, reference beinghad to the accompanying drawings, constituting a part of suchspecification. Of such drawings- .Figurel is an edge view of myinvention.

Figure 2, a side elevation of it.

Figure 3, a section takenon the line :c :e of iig.v 1.

Figure .dds aseetion of it, such section being taken on line y y of fig.3.

Similar lestersef reference in thediifcrent figures indicatecorresponding parts.

4The invention consists fi'n an improved'wrench, as made not only withone of its jaws stationary with respect to and projecting from itsrotary segmental plate, and with the otherjaw movable upon a barparallel with the cord of such plate, and projecting from the stationaryjaw, but as having a screw and a screw-rack applied to the movable jawand its supporting bar, the whole being arranged substantially in mannerand so as to operato as hereinafter explained; and my invention furtherconsists in the combination of such a wrench and means, substantially ashereinafter specified, whereby its segmental plate, after a movement ineither direction on its vcentre-pin, can be held firmly in position`with respect to the handle or shank in which it is placed.

In the aforesaid drawings, A `represents' the handle or shank of thewrench, such shank being furcated to receive a segmental plate, B, whichWorks on a rod, pin, or screw, C, passing through it and the shank', and

'being screwed-into the latter. From the straight or plane 'side of thisplate B, at one end, there projects at right angles a jaw, D, and fromsaid jaw vthere extends, at right angles, and parallel with the eordofthe plate B, a bar, E, on which the movablojaw E' is fitted, so as to becapable of sliding freely thereon, the said jaw being operated by ascrew, G, which lworks in a rack, a, formed in the outer side of the barE. In the curved edge of the plateB there, `isa series et' holes, l),they being at equal distances apart. A pin or bolt, II, fitted in asocket in the shank A, and having a spiral spring, I, acting against-it,which has a tendency to throw the pin into the holes b, (seeig. 3,) isto operate with either of such holes. The pin II has a button, c, on itsouter,y

end, to enable the opera`tor'-to draw it out of any one of the holes bin which it may chance to be, when he may be desirous of turning theplatci'so as to bring thojaws in'any desirable position with the shank.

v In my wrench the segmental plate can be so ixeil by the bolt, when ineither of its holes b, that it cannot be moved' in either direction onits centre-pin. This is of much importance, as it enables the handle orshank to operate the wrench in one direction as well as in its oppositewhen the'jaws are grasping an article.

I do not claim a wrench constructed as represented in t'heUnited StatesPatent No. 45,931; nor do I claim one made with a rotaryjaw-plate orseries 'of jaws combined with a handle, and having a stop-catch to tixthe said rotary jaw-plate in any desirable position. l

i With my invention I have one stationary and one movable jaw, insteadet' two movable or two fixed jaws. Themovable jaw can -he set up closeto the stationaryjaw, and both jaws are supported by or combined withthe rotary plate, se as not easily to be broken away from it. Thus itwill be seen that-my wrench presents peculiar and important advantageswith reference to the patented wrench above mentioned.

What I claim as my invention, is-' l i Y My improved wrench, as made notonly-with one of its jaws stationary with respect to and projecting fromits rotary segmental plate, and with the other jaw movable upon aharparallel with the cord of such plate, and

projecting frol'nthe stationary jaw, but as having a screw and ascrew-rack applied to the movablejaw and its supporting bar, the wholebeing arranged substantially in manner and so as to operate asspecified.

I also claim the combination of such a wrench and means, substantiallyas described, (viz, the bolt-holes Z1 Ii'b and the spring-bolt IL)whereby its segmental lplate may be fixed in position so as to cause itto move with the handle when Amoved in either direction, that is,forward or backward, while the jaws may be hold of an ob'ect. J DENNISHARRIGAN.

Witnesses:

R. H. EDDY, F. P. HALE, Jr.

